[Cbc] Two questions on Cbc Solver with AMPL

[Giacomo Nannicini]

You can get CBC binaries from the webpage you listed.

To compile ASL with CBC, go to the ThirdPary/ASL folder, and get.ASL.

G

On Mon, Sep 25, 2017 at 11:22 PM, Feng Gao <mangotree.gf at gmail.com> wrote:
> Dear Giacomo:
>
>    Thank you! Can you please let me know where to locate ASL code  or binary
> image? I searched AMPL website---- opensource section, but could not find
> them...
>
> http://ampl.com/products/solvers/open-source/
>
> Thanks,
>
> Feng
>
> On Mon, Sep 25, 2017 at 8:10 PM, Giacomo Nannicini <giacomo.n at gmail.com>
> wrote:
>>
>> Feng,
>> I believe you need to compile with the ASL solver, otherwise CBC will not
>> have an AMPL interface. Look into ThirdParty/ASL.
>>
>> You can probably also get binaries directly from the AMPL website, in the
>> open-source solver section.
>>
>> Giacomo
>>
>> On Sep 24, 2017 10:38 PM, "Feng Gao" <mangotree.gf at gmail.com> wrote:
>>
>> Dear Cbc Users:
>>
>>       I have two questions regarding to Cbc Solver with AMPL. Please help.
>>
>> 1. I use AMPL + Cbc solve to run a case, however, AMPL issued an error
>> message "Unable to open a file" where a solution is located. I compiled the
>> Cbc solver using VS and the solver is working fine in a stand-alone mode.
>>
>>
>> ---------------------------------------------------------------------------------------------------------------------------------------------------------
>> ampl: solve
>> ampl? ;
>> Welcome to the CBC MILP Solver
>> Version: 2.9.9
>> Build Date: Sep 19 2017
>>
>> command line - C:\COIN\Cbc\Cbc\MSVisualStudio\v10\x64-v100-Release\cbc.exe
>> C:\Users\Feng\AppData\Local\Temp\at2596 -AMPL (default strategy 1)
>> Unable to open file C:\Users\Feng\AppData\Local\Temp\at2596
>> No match for AMPL - ? for list of commands
>> Total time (CPU seconds):       0.00   (Wallclock seconds):       0.00
>>
>> Error executing "solve" command:
>> can't open C:\Users\Feng\AppData\Local\Temp\at2596.sol
>>
>> ---------------------------------------------------------------------------------------------------------------------------------------------------------
>>
>> 2. How to set a "MIP GAP" termination criteria in Cbc solver command line.
>> The manuals only provide a time limit or the maximal number of iterations
>> termination criteria though.
>>
>> Thank you very much,
>>
>> Feng
>>
>>
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>>
>